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Chaetoglobosin A, an Inhibitor of Bleb Formation on K562 Cells Induced by Phorbol 12,13-Dibutyrate
KO, HACK-RYONG,KIM, BO YEON,AHN, SOON-CHEOL,OH, WON KEUN,KIM, JIN-HEE,LEE, HYUN SUN,KIM, HWAN-MOOK,HAN, SANG-BAE,MHEEN, TAE0ICK,AHN, JONG-SEOG 한국미생물 · 생명공학회 1998 Journal of microbiology and biotechnology Vol.8 No.6
( Tae Jun Park ),( Keun Soo Ahn ),( Yong Hoon Kim ),( Hyungseop Kim ),( Ui Jun Park ),( Hyoung Tae Kim ),( Won Hyun Cho1 ),( Woo Hyun Park ),( Koo Jeong Kang ) 대한간학회 2014 Clinical and Molecular Hepatology(대한간학회지) Vol.20 No.1
Hepatopulmonary syndrome (HPS) is a serious complication of end-stage liver disease, which is characterized by hypoxia, intrapulmonary vascular dilatation, and liver cirrhosis. Liver transplantation (LT) is the only curative treatment modality for patients with HPS. However, morbidity and mortality after LT, especially in cases of severe HPS, remain high. This case report describes a patient with typical findings of an extracardiac pulmonary arteriovenous shunt on contrast-enhanced transesophageal echocardiography (TEE), and clubbing fingers, who had complete correction of HPS by deceased donor LT. The patient was a 16-year-old female who was born with biliary atresia and underwent porto-enterostomy on the 55th day after birth. She had been suffered from progressive liver failure with dyspnea, clubbing fingers, and cyanosis. Preoperative arterial blood gas analysis revealed severe hypoxia (arterial O2 tension of 54.5 mmHg and O2 saturation of 84.2%). Contrast-enhanced TEE revealed an extracardiac right-to-left shunt, which suggested an intrapulmonary arteriovenous shunt. The patient recovered successfully after LT, not only with respect to physical parameters but also for pychosocial activity, including school performance, during the 30-month follow-up period. (Clin Mol Hepatol 2014;20:76-80)
A Study on PFC of Active Clamp ZVS Flyback Converter
Tae-Young Choi,Jeong-Joon Ahn,Dong-Kyun Ryu,Woo-Suk Lee,Chung-Yuen Won,Soo-Seok Kim 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10
This paper analyzed PFC of active clamp ZVS flyback converter by adding two methods PFC (Power Factor Correction) circuit - two-stage and single-stage. The addition of active clamp circuit also provides a mechanism for achieving ZVS of both the primary and auxiliary switches ZVS also limits the turn off di/dt of the output rectifier, reducing rectifier-switching loss and switching noise, due to diode reverse recovery<br/> As a result, the proposed converters have characteristics of the reduced switching noise and high efficiency in comparison to conventional flyback converter<br/> The simulation and experimental results show that the proposed converter improve the input PF of 300W ZVS flyback converter by adding single-stage, two-stage PFC circuit.<br/>
A Note on Intuitionistic Fuzzy Subgroups
Tae-Chon Ahn(안태천),Kyung-Won Jang(장경원),Seok-Beom Roh(노석범),Kul Hur(허걸) 한국지능시스템학회 2005 한국지능시스템학회 학술발표 논문집 Vol.15 No.2
In this paper, We discuss various types of sublattice of the lattice of intuitionistic fuzzy subgroups of a given group. We prove that a special class of intuitionistic fuzzy normal subgroups constitutes a modular sub lattice of the lattice of intuitionistic fuzzy subgroups. Moreover, we exhibit the relationship of the sublattices of the lattice of intuitionistic fuzzy subgroups.